|Publication number||US4379469 A|
|Application number||US 06/335,767|
|Publication date||Apr 12, 1983|
|Filing date||Dec 30, 1981|
|Priority date||Dec 30, 1981|
|Publication number||06335767, 335767, US 4379469 A, US 4379469A, US-A-4379469, US4379469 A, US4379469A|
|Inventors||Arne J. Britz|
|Original Assignee||Britz Arne J|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (4), Classifications (8), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
There are many instances in which fire hydrants experience unauthorized use and further instances wherein the side outlet caps of the hydrants are removed in an unauthorized manner.
While various forms of covers for the valve control rods of hydrants heretofore have been designed together with special wrenches and side outlet cap structures to prevent unauthorized use of fire hydrants and unauthorized removal of the side outlet caps thereof, most of these prior devices require multiple specially constructed components which are expensive to incorporate in existing fire hydrants. Accordingly, a need exists for structure whereby the engagement of the upper pentagonal terminal end of a fire hydrant control rod with a conventional wrench may be prevented and engagement of the central pentagonal projections on the side outlet caps of a hydrant by a conventional wrench may be prevented.
Examples of various forms of previously known devices including some of the general structural and operational features of the instant invention are disclosed in U.S. Pat. Nos. 3,453,655, 3,453,897, 3,916,939, 4,033,372 and Des. 211,342.
The improved hydrant bonnet and cap structure of the instant invention incorporates the provision of three upwardly projecting lobes on the bonnet of an associated fireplug spaced outwardly from the pentagonal upper terminal end of the valve control rod of the associated hydrant and the provision of similar horizontally outwardly projecting lobes spaced about and outwardly from the center pentagonal projection carried by the side outlet closure caps of a conventional fireplug.
The main object of this invention is to provide structure whereby unauthorized use of a fireplug as well as unauthorized removal of the side outlet cover caps thereof may be discouraged.
Yet another object of this invention is to provide an apparatus in accordance with the preceding object and retaining the ability of quick operation of the associated fireplug and removal of the side outlet caps thereof through the utilization of a specially constructed wrench.
Yet another object of this invention is to provide an improved fireplug bonnet and side outlet cap construction which may be readily retrofitted to existing fireplugs.
A final object of this invention to be specifically enumerated herein is to provide a structure in accordance with the preceding objects and which will conform to conventional forms of manufacture, be of simple construction and easy to use, so as to provide a device that will be economically feasible, long lasting and relatively trouble-free in operation.
These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout.
FIG. 1 is a side elevational view of a fireplug including a bonnet and side outlet caps therefor constructed in accordance with the present invention;
FIG. 2 is a top plan view of the assemblage illustrated in FIG. 1; and
FIG. 3 is an enlarged perspective view of a wrench specially constructed for use in conjunction with the instant invention.
Referring now more specifically to the drawings, the numeral 10 generally designates a conventional fire hydrant including an upstanding tubular body 12 having a pair of side lateral outlets 14 and 16 and a hydrant control valve rod equipped with a pentagonal upper terminal end 18. Conventionally, the upper end of the body 12 is equipped with a generally hemispherical bonnet (not shown) upwardly through the center of which the terminal end 18 projects. The conventional generally hemispherical bonnet is attached to the upper end of the body 12 through the utilization of suitable fasteners 20 secured through a mounting flange portion 22 carried by the upper end of the body 12 and threadedly engaged in the bonnet from the underside thereof. However, inasmuch as the terminal end 18 on a conventional fireplug is fully exposed from all horizontal directions, the terminal end 18 may be readily engaged by different forms of wrenches giving rise to at least occasional unauthorized usage of the fireplug 10.
In order to prevent such unauthorized usage, the instant invention incorporates a downwardly opening bonnet 24 secured to the mounting flange portion 22 through the utilization of the fasteners 20 and the bonnet 24 includes a central upper wall portion 26 through which the terminal end 18 projects. However, the bonnet 24 includes three upwardly projecting generally conical lobes 28 formed integrally therewith and spaced about and outwardly from the central upper wall portion 26. Thus, conventional wrenches may not be engaged with the terminal end 18 in order to turn the latter.
Rather, a specially designed wrench 30 including a horizontal handle 32 and a depending socket 34 on one end of the handle 32 must be used in order to engage and turn the terminal end 18. The effective vertical height of the socket 34 is at least slightly greater than the effective vertical height of the lobes 28 above the central upper wall portion 26. Therefore, the wrench 30 may be engaged with the terminal end 18 and the free end of the handle 32 may be swung about the center axis of the socket 34 in order to rotate the terminal end 18 for opening and closing the valve of the fire hydrant 10.
Also, the lateral side outlets 14 and 16 are conventionally provided with partial spherical closure caps whose center portions include non-circular projections which may likewise be engaged by a proper wrench. However, the hydrant 10 includes closure caps 38 and 40 threadedly engaged with the outlets 14 and 16 in the same manner as conventional closure caps, but the caps 38 and 40 are also provided with conical lobes 42 spaced about the central portions thereof from which non-circular projections 44 project for engagement by the socket 34 of the wrench 30. Of course, the lobes 42 also prevent conventional wrenches from being engaged with the projections 44.
It will be noted from FIG. 1 of the drawings that the central upper wall portion 26 through which the terminal end 18 upwardly projects is disposed at an elevation slightly higher than the lowest portions 50 of the upper marginal portions of the bonnet 24 disposed centrally intermediate adjacent lobes 28. Accordingly, any rain water falling onto the upper wall portion 26 of the bonnet 24 may drain radially outwardly of the outer marginal portions of the bonnet 24 between adjacent lobes 28 in order to prevent such water from collecting and freezing in sub-freezing weather. Further, it will be noted that the bonnet 24 comprises a full replacement for the conventional partial spherical bonnet and, therefore, that the bonnet 24 may be readily applied to the fire hydrant 10 as a replacement for the conventional bonnet thereof.
The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1792622 *||Dec 21, 1927||Feb 17, 1931||Hadwik Mfg Co Inc||Closure|
|US3104554 *||Dec 3, 1959||Sep 24, 1963||Mueller Co||Fire hydrant|
|US3453655 *||Dec 19, 1966||Jul 1, 1969||Garcia Bonifacio||Street water hydrant guard|
|US3929152 *||Jul 10, 1974||Dec 30, 1975||Gerald A Graham||Fire hydrant cap and actuating tool therefor|
|US3935877 *||Jul 23, 1974||Feb 3, 1976||Franceschi Peter A||Tamper-proof locking system for fire hydrants|
|US4033372 *||Jun 16, 1976||Jul 5, 1977||Bowman Harold M||Fire hydrant locking device|
|US4182361 *||Oct 17, 1977||Jan 8, 1980||Hydra-Guard Corporation||Fire hydrant protection device|
|DE619436C *||Sep 9, 1932||Sep 30, 1935||Cosimo Carfagna||Saeulenhydrant mit eine Kammer bildendem Auslasskopf|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4526193 *||Aug 22, 1984||Jul 2, 1985||Edward Drach||Security cap assembly and actuator|
|US4825898 *||Aug 15, 1988||May 2, 1989||Vis Arthur D||Tamper prevention device for fire hydrants|
|US5520210 *||Sep 11, 1995||May 28, 1996||Barton; James M.||Protective shield for fire hydrant|
|US6112761 *||Nov 15, 1999||Sep 5, 2000||Scotto; Gary||Fire hydrant locking device and wrench|
|U.S. Classification||137/296, 137/800, 220/284|
|Cooperative Classification||Y10T137/9247, E03B9/06, Y10T137/5468|
|Oct 10, 1986||FPAY||Fee payment|
Year of fee payment: 4
|Nov 13, 1990||REMI||Maintenance fee reminder mailed|
|Apr 14, 1991||LAPS||Lapse for failure to pay maintenance fees|
|Jun 25, 1991||FP||Expired due to failure to pay maintenance fee|
Effective date: 19910414